Table 2.

Accuracies of the classification of negative spectrum data in the five-fold cross-validation experiment (%).

Group	BPNN	KNN	SVM	DBN+GD+Softmax	DBN+L-BFGS+Softmax
1	94.12	97.06	100.00	100.00	100.00
2	88.24	79.41	94.12	100.00	94.12
3	91.18	91.18	82.35	94.12	94.12
4	91.18	94.12	61.76	97.06	82.35
5	73.53	79.41	52.94	73.53	76.47
Mean	87.65	88.24	78.23	92.94	89.41

Bold values indicate the best results.